公开(公告)号：US5380510A

公开(公告)日：1995-01-10

申请号：US166261

申请日：1993-12-09

申请人： Takashi Matsui ,  Nobuki Watanabe ,  Masayuki Arimura ,  Eiji Kanemaru ,  Yuzo Horinouchi ,  Mutsuhiro Ito

发明人： Takashi Matsui ,  Nobuki Watanabe ,  Masayuki Arimura ,  Eiji Kanemaru ,  Yuzo Horinouchi ,  Mutsuhiro Ito

IPC分类号： C01B33/152 ,  C01B33/14

CPC分类号： C01B33/152

摘要： This invention provides a method for manufacturing silica gels in a form of scales or needles having a pore volume and a specific surface area being relatively large and being controlled. Silicic acid sol is frozen, crystallized and deposited in gaps among crystal faces of crystals of solvent of the sol, thus obtaining the frozen silica hydrogels in the form of scales or needles. After unfreezing the frozen silica hydrogels, a hydrothermal polymerization is carried out. Subsequently, the silica hydrogels are dried, thus obtaining the silica gels in the form of scales or needles. Furthermore in the invention, by controlling the gelation time period of silica sol, the silica gels with their configuration controlled can result from even inexpensive silica sol. The invention has the advantage that a freeze-drying step is not required: just through freezing, unfreezing, washing and hydrothermal polymerization steps, the physical properties of the silica gels can be controlled.

摘要翻译： 本发明提供了一种制备具有孔体积和比表面积相对较大并被控制的鳞片或针状形式的硅胶的方法。 将硅酸溶胶冷冻，结晶沉积在溶胶溶剂晶体的晶面之间的间隙中，从而获得鳞片或针状冷冻的二氧化硅水凝胶。 解冻冷冻二氧化硅水凝胶后，进行水热聚合。 随后，将二氧化硅水凝胶干燥，得到鳞片或针形状的硅胶。 此外，在本发明中，通过控制二氧化硅溶胶的凝胶化时间，其控制结构的硅胶可由廉价的二氧化硅溶胶得到。 本发明的优点是不需要冷冻干燥步骤：通过冷冻，解冻，洗涤和水热聚合步骤，可以控制硅胶的物理性能。